Key Structure and Keyboard Using the Same

1. A key structure, comprising: a bottom plate; a keycap; a lifting mechanism configured to pivotally connect the bottom plate and the keycap; a backlight module disposed on the bottom plate and provided with a through hole, a first surface and a second surface opposite to the first surface, wherein the through hole is extended to the second surface from the first surface; a fixer pressing the first surface; and a fixing portion configured to press the fixer on the bottom plate; wherein the fixing portion comprises a penetrating portion and a first pressing portion; the penetrating portion is connected to the first pressing portion and passes through the through hole of the backlight module and the bottom plate, and the first pressing portion presses the fixer; and wherein the fixing portion further comprises a second pressing portion, the penetrating portion is connected to the first pressing portion and the second pressing portion, and the second pressing portion presses the bottom plate.

2. The key structure according to claim 1 , wherein the fixing portion and the bottom plate are integrally formed in one piece.

3. The key structure according to claim 1 , wherein the bottom plate comprises a positioning column provided with a positioning hole; the positioning column passes through the through hole of the backlight module, and the fixing portion passes through the positioning hole of the positioning column.

4. The key structure according to claim 1 , wherein the fixer further comprises a pressing plate and a positioning column, the pressing plate presses the first surface, and the positioning column is protruded from the pressing plate; the pressing plate is provided with a first surface and a second surface opposite to the first surface, the second surface of the pressing plate presses the first surface of the backlight module, and the positioning column is protruded with respect to the first surface of the pressing plate.

5. The key structure according to claim 4 , wherein the entire second surface of the pressing plate presses the first surface of the backlight module.

6. The key structure according to claim 1 , wherein the fixer further comprises a pressing plate and a fixing column, the pressing plate presses the first surface, the fixing column is protruded from the pressing plate, the fixing column is provided with a first end surface and a second end surface opposite to the first end surface, and the second end surface of the fixing column is interposed between the first surface of the backlight module and the first end surface.

7. The key structure according to claim 1 , wherein the bottom plate is provided with a light hole, which partly overlaps the fixer along the lifting direction of the lifting mechanism.

8. The key structure according to claim 1 , wherein the fixer further comprises a pressing plate and a positioning column, the bottom plate is provided with a light hole, the pressing plate presses the first surface, the positioning column passes through the backlight module, and the positioning column and the light hole do not overlap along the lifting direction of the lifting mechanism.

9. The key structure according to claim 1 , wherein the entire fixer is located beside the first surface of the backlight module.

10. The key structure according to claim 1 , wherein the bottom plate is provided with a first surface and a second surface opposite to the first surface, the backlight module is disposed on the first surface of the bottom plate by the second surface, and the fixing portion is recessed with respect to the second surface of the bottom plate.

11. A keyboard, comprising: a key structure, comprising: a bottom plate; a keycap; a lifting mechanism configured to pivotally connect the bottom plate and the keycap; a backlight module disposed on the bottom plate and provided with a through hole, a first surface and a second surface opposite to the first surface, wherein the through hole is extended to the second surface from the first surface; a fixer pressing the first surface; and a fixing portion configured to press the fixer on the bottom plate; a casing; and a fixing member configured to fix the casing and the fixer of the key structure; wherein the fixing portion comprises a penetrating portion and a first pressing portion; the penetrating portion is connected to the first pressing portion and passes through the through hole of the backlight module and the bottom plate, and the first pressing portion presses the fixer; and wherein the fixing portion further comprises a second pressing portion, the penetrating portion is connected to the first pressing portion and the second pressing portion, and the second pressing portion presses the bottom plate.

12. The keyboard according to claim 11 , wherein the fixing portion and the bottom plate are integrally formed in one piece.

13. The keyboard according to claim 11 , wherein the bottom plate comprises a positioning column provided with a positioning hole; the positioning column passes through the through hole of the backlight module, and the fixing portion passes through the positioning hole of the positioning column.

14. The keyboard according to claim 11 , wherein the fixer further comprises a pressing plate and a positioning column, the pressing plate presses the first surface, and the positioning column is protruded from the pressing plate; the pressing plate is provided with a first surface and a second surface opposite to the first surface, the second surface of the pressing plate presses the first surface of the backlight module, and the positioning column is protruded with respect to the first surface of the pressing plate.

15. The keyboard according to claim 14 , wherein the entire second surface of the pressing plate presses the first surface of the backlight module.

16. The keyboard according to claim 11 , wherein the fixer further comprises a pressing plate and a fixing column, the pressing plate presses the first surface, the fixing column is protruded from the pressing plate, the fixing column is provided with a first end surface and a second end surface opposite to the first end surface, and the second end surface of the fixing column is interposed between the first surface of the backlight module and the first end surface.